Tag Archives: fuse

Teardown of a medium voltage fuse (7200 V / 200 A)

I got my hands of a old NEBB (Norsk Elektriske Brown Boveri) medium voltage fuse, rated for 7200 V, 200 A and 350 MVA. My best guess from the company name is that it originates from before 1988 where NEBB … Continue reading

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Mysterious failure of a Siemens mini circuit breaker C6A (5SY41)

From one day to another this mini circuit breaker stopped working, I had been using it wrongly as a on/off switch and was wondering if there was a mechanism inside to disable it after too many on/off switches, as MCBs … Continue reading

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